Paper feed mechanism

ABSTRACT

Combination viewing and printing apparatus characterized by the capability of: producing a positive print form either a negative or a positive input film; printing on plain sheet paper which is fed from the apparatus at an optimum location; selecting the information to be printed from a microfilm transported by means of a differential drive arrangement which optimizes the film movement; accommodating various types of recording media, for example roll microfilm and microfiche; and presenting a plurality of image formats to the viewing screen and a recording media in a predetermined orientation convenient for viewing and printing.

United States Patent 1191 Hughes et al. July 3, 1973 1 1 PAPER FEED MECHANISM 3.510.217 5/1971 Cirimele et al. 355/16 3,062,095 11/1962 R tk t l 355/8 {75 Inventors: Robert E. Hughes, Webster; Frank u us 8 a J. Sanza, Rochester; Charles E.

- Primary Examiner-John M. Horan l smith Webster al ofN Y Attorney-James J. Ralabate, John E. Beck and Ben a- [73] Assignee: Xerox C0rporation,Stamford, Conn. i Sklar [22] Filed: Sept. 18, 1970 21 Appl. No.: 73,549 [57] ABSTRACT Combination viewing and printing apparatus character- [52] U S Cl 7 ized by the capability of: producing a positive print form either a negative or a positive input film; printing [51] Int. Cl. G03g 15/14 on lain Sheet 3 er which is fed from the a aratus at [58] Field of Search ..355/3,12,14,l6, P l h f P b 355/10 99 an op imum ocauon, se eetmg t e in ormat1on to e prmted from a microfilm transported by means of a d1f- [56] References Cited ferential drive arrangement which optimizes the film movement; accommodating various types of recording UNITED STATES PATENTS media, for example roll microfilm and microfiche; and 3,511,564 5/1970 Gawin 355/5 pres nting a plurality of image formats to the viewing g g screen and a recording media in a predetermined orienc wertz... 3,575,506 4/1971 Knechtel 355/16 comment for vlewmg and pnmmg' 6 Claims, 33 Drawing Figures PATENTEDJIJL 3 I975 INVENTORS ROBERT E. HUGHES FRANK J. SANZA BY CHARLES E. SMITH PATENTEUJIIL' a ms PAIENIE'BJIL 3 an SIEEY @SE PAIENTEBJHL ama 3.743.402

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3 568 A I Y R Jr sa 636 AC. PWR 628 SOURCE I PATENTEBJUL 3 I973 START MER POSU CHARGE MOTOR 0N COROTRON ON MER P08 (4) EXPOSURE LAMP ON T DELAY CKT MER P03 (3) v DEVELOP MOTOR ON COROTRON 0N MER P08 (4) N N O (5 DELAY CKT MER P08 (6) REVERSE DELAY TRANSFER MOTOR ON CLUTCH ON MER P03 (7) TRANSFER MOTOR ON MER P08 (8) STOPMOTOR DELAY CKT MER P08 (9) RESET MER POSUO) END MER PSI 

1. A combination of viewing and printing apparatus, said apparatus comprising: housing structure including a rear section and a front section, said front section having a viewing area thereat and an opening therein through which an image receiving surface can be moved; means including electrostatic discharge means for producing a transferable image on an elongated photosensitive web; means including a back-up roller for moving said photosensitive web in a first direction during formation of said image; means including a transfer roll disposed adjacent said back-up roller for effecting transfer of said transferable image to an image receiving surface; means for moving said photosensitive web in a direction opposite to said first direction during image transfer; and means for moving said transfer roll towards said photosensitive web during transfer and for holding said roll away therefrom during a non-transfer period of time, said transfer roll and said back-up roller cooperating during transfer to sandwich said photosensitive web and said image receiving surface in intimate contact therebetween.
 2. A copier according to claim 1, further including automatic feeding mechanism comprising a tray for supporting a stack of plain paper constituting a plurality of image receiving surfaces and a paper gripper adjacent the leading edge of the paper and still further including means for actuating said paper gripper only during image transfer.
 3. Structure as specified in claim 2 wherein, said paper tray is pivotably supported adjacent one end thereof and biased adjacent the other end thereof such that the top sheet of paper firmly engages said paper gripper.
 4. Structure as specified in claim 3 including, a paper tray mounting structure for supporting said tray in said machine.
 5. Structure as specified in claim 4 wherein, said paper tray supporting structure comprises a pair of spaced apart guides each having a horizontal channel and, wherein said tray is provided with a pair of sidewardly projecting members adjacent one end thereof and receivable in said channels during installation of said tray, said channels being disposed adjacent the bottom of said guides.
 6. Structure as specified in claim 5 wherein, said channels are open at the top adjacent one end thereof to permit movement of said sidewardly projecting members out of said channels under the influence of a bias spring. 